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Thermal Analysis of Hypersonic Inlet Flow with Exergy-Based Design Methods

Author(s): David J. Moorhouse | Charles M. Hoke | James P. Prendergast

Journal: International Journal of Thermodynamics
ISSN 1301-9724

Volume: 5;
Issue: 4;
Start page: 161;
Date: 2002;
Original page

Keywords: exergy analysis | thermoeconomics | 2nd Law of Thermodynamics | hypersonic aircraft/vehicles | shock-on-lip positioning | MHD shock control

This paper presents results of work that has been done in developing use of the Second Law of Thermodynamics and methods such as exergy and thermoeconomics into a system-level analysis and design methodology. The application of these methods to the design of a complete flight vehicle is illustrated by considering an integrated airframe/propulsion system as a device to do work. This shows how system-level consideration of exergy applies to all vehicle systems in consistent terms. For the hypersonic inlet flow problem, it is shown that a thermal energy exchange with the inlet flow could be used to position the inlet shock in the optimum shock-on-lip position for off-nominal flight conditions. The thermal heat exchange analysis has been done for a full range of Mach numbers both higher and lower than nominal. It is shown that there is a potential benefit in terms of reduced exergy destroyed using thermal energy addition than by the shock at higher Mach numbers. The paper then discusses how a device to accomplish this result would have to be integrated into a complete vehicle design.
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